$(document).ready(function() {
	$.validator.addMethod("smallEngAndDigits", function(value, element) {
		for (var i=0; i<value.length; i++) {
			var charCode = value.charAt(i).charCodeAt();
			
			if (!((charCode >= 48 && charCode <= 57) || (charCode >= 97 && charCode <= 122)))
				return false;
		}
		return true;
	});
});